Chemical formula of compound describes and shows the number of atoms of each element that are present in a compound. As in tyrosine number of atoms are: hydrogen = H = 11 carbon = C = 9 oxygen = O = 3 nitrogen = N = 1 So the chemical formula will be: C₉H₁₁NO₃ In writing chemical formula of organic compound, we write carbon first then hydrogen and then the other atoms.
